Operation Research

ORTEC and Operations Research

The science of Operations Research has revolutionized people, business and society in many ways. For decades it has proven to be the best answer to handle complexity in any economic environment. Enabling companies to create fact based and robust strategies, while becoming agile and creating opportunities for future positioning.

ORTEC = Operations Research Technology

ORTEC employs a solid group of professionals with a strong background on descriptive, diagnostic, predictive and prescriptive analytics.

In addition, hundreds of ORTEC professionals have an MSc degree in a relevant analytics field, mostly Operations Research. Our MSc professionals collaborate with some of the most respected universities and research institutes in the world, giving ORTEC a significant competitive edge. Our position at the forefront of new developments in research enables us to apply the outcome of technological innovations in our products. And while doing so, solving the world most complex business challenges in partnership with our customers.

Chaired professors

Prof. dr. Gerrit T. Timmer co-founded ORTEC and wrote his PhD dissertation entitled “Global Optimization: A stochastic Approach” at the Erasmus University Rotterdam. He is chaired Professor of business econometrics at the VU University, member of the Innovation Commission of the Mathematics Platform of the Netherlands (PWN), member of the Deltaplan Mathematics Commission and former President of the Netherlands Society for Statistics and Operations Research (VVS-OR).

Prof. dr. Goos Kant is chaired Professor of Logistic Optimization at Tilburg University. He wrote his PhD dissertation entitled “Algorithms for Drawing Planar Graphs” at the University of Utrecht. Together with Coca-Cola he was finalist (in 2007) for the prestigious Franz Edelman Award. Co-authored the book “The New World of Planning”. At ORTEC he is partner, member of the supervisory board and Head of Industry.

Prof. dr. Joaquim Gromicho wrote his PhD dissertation entitled “Quasi-convex Optimization and Location Theory” at the Erasmus University Rotterdam. He is endowed professor of Applied Optimization in Operations Research at the VU University and Editor in chief of STAtOR, the periodic magazine of the Dutch society for statistics and operations research. At ORTEC he is Scientific Officer.

Doctors

Dr. Daan Ament co-founded ORTEC and wrote his PhD dissertation on “Econometrics and Quantitative Economics” at the Erasmus University Rotterdam. His leadership at ORTEC is strong in several areas requiring modeling of complex business situations.

Dr. Theodore Athanasopoulos wrote his PhD dissertation entitled “The Multi-Period Vehicle Routing Problem and its Applications” at the University of the Aegean and at ORTEC he is solution architect of advanced planning systems.

Dr. ir. Ronald Buitenhek wrote his PhD dissertation entitled “Performance Analysis of Dual Resource Manufacturing Systems” at the University of Twente. At ORTEC his prescriptive analytics expertise is at the areas of supply chain optimization and capacity planning.

Dr. ir. Kamiel Cornelissen wrote his PhD dissertation entitled “Smoothed Analysis of Belief Propagation and Minimum-Cost Flow Algorithms” at the University of Twente. At ORTEC he is an OR engineer working in the areas of transportation and service planning.

Dr. Steven van Dijk wrote his PhD dissertation entitled “Genetic Algorithms for Solving Combinatorial Optimization Problems in Map Labeling” at the University of Utrecht. At ORTEC he manages Research and Technology Development.

Dr. Laurenz Eveleens wrote his PhD dissertation entitled “IT Forecast Quality in Measure and Number”, VU University. At ORTEC he is responsible for a number of advanced analytics projects aiming at extracting information from sports data, among others from video footage.

Dr. ir. Noud Gademann wrote his PhD dissertation entitled “Linear Optimization in Random Polynomial Time” at the University of Twente and is researcher at the Eindhoven University of Technology. At ORTEC he is a senior logistics consultant.

Dr. Jelke van Hoorn wrote his PhD dissertation entitled “Dynamic Programming for Routing and Scheduling. Optimizing Sequences of Decisions” at the Vrije Universiteit in Amsterdam under supervision of professors Gerrit Timmer and Joaquim Gromicho. At ORTEC he is a senior OR Engineer

Dr. Caroline Jagtenberg wrote her PhD dissertation entitled “Efficiency and fairness in ambulance planning” at the CWI. Meanwhile, she worked at ORTEC as a OR engineer in the area of Workforce Planning. Currently, she is an OR consultant working on problems in logistics.

Dr. ir. Leendert Kok wrote his PhD dissertation entitled “Congestion Avoidance and Break Scheduling within Vehicle Routing” at the University of Twente in close contact with ORTEC. At ORTEC he leads a team of experts in applied optimization and participates in research projects with several universities. He is an advisor to the VU University on curricular matters.

Dr. George Ninikas wrote his PhD dissertation at the University of the Aegean entitled “Solving the Dynamic Vehicle Routing Problem with Mixed Backhauls through Re-Optimization” while being a senior logistics and supply chain consultant at ORTEC.

Dr. ir. Ard Overkamp wrote his PhD dissertation on “Control of Discrete Event Systems” at the Dutch research institute for mathematics and computer science, CWI. At ORTEC he is a senior architect of complex optimization and decision support systems.

Dr. ir. Gerhard Post wrote his PhD dissertation entitled “KP Hierarchies and Reductions. Algebraic and Geometric Aspects”. He is Assistant Professor at the department of Applied Mathematics of the University of Twente where he focuses on research on discrete optimization. At ORTEC he pioneers research in several areas including transportation, load building, staffing and rostering.

Dr. Maarten Soomer wrote his PhD dissertation about “Airport Runway Operations Scheduling Using Airline Preferences” at the VU University and at ORTEC is Senior Marketing Analytics Consultant. Maarten often is a guest lecturer on Revenue Management and Marketing Analytics at various universities and an author of various articles on Revenue Management. He is also a co-founder of the Dutch Pricing & Revenue Management Network Prema.

Dr. ir. Judith Spitter wrote her PhD dissertation entitled “Rolling Schedule Approaches for Supply Chain Operations Planning” at the Eindhoven University of Technology. At ORTEC she is a specialist in routing optimization.

Dr. Bertus Talsma wrote his PhD dissertation on “Performance Analysis in Elite Sports. Statistical Comparison, Development, Ranking, and Selection in Speed Skating and Soccer”, University of Groningen. At ORTEC he specializes in sport analytics.

Dr. ir. Huib Trommel wrote his PhD dissertation on “Theoretical Graph Theory” at the University of Twente and is at ORTEC responsible for the consistency and quality of the data used to efficiently compute optimal routes on highly detailed road networks.

Dr. Bart Veltman wrote his PhD dissertation entitled “Multiprocessor Scheduling with Communication Delays” at the Dutch research institute for mathematics and computer science, CWI. He is affiliated with CHOIR - Center for Healthcare Operations Improvement & Research, University of Twente where he focuses on research on optimization of Workforce Planning and Scheduling. At ORTEC he specializes in health care analytics.

Dr. Egbert van der Veen wrote his PhD dissertation entitled “Personnel Preferences in Personnel Planning and Scheduling” at the University of Twente while working at ORTEC in related areas. At ORTEC he is consultant Global Business Development specialized in presales and consultancy in the area of Workforce Planning and Workforce Scheduling.

Certified Analytics Professional

Stefan Schuurman is a certified analytics professional (CAP) and has a Master’s degree in Econometrics and Operations Research. He is specialized in analysis and design of complex optimization and decision support systems. At the ORTEC Consulting Group, he focuses on the railway industry.

Henny Holtman is a CAP certified technical consultant at ORTEC who received a Master’s degree in Econometrics, Operations Research and Actuarial Studies from the University of Groningen with the distinction ‘cum laude’. At ORTEC he is specialized in modeling and simulation of pressure based flow network problems.

Phd candidates

Ineke Meuffels received a Master’s degree in Econometrics and Operations Research from Tilburg University. Ineke currently works for ORTEC Consulting Group while studying for a PhD on “The Design of Road and Air Networks for Express Service Providers Express” at Tilburg University.

Iris van Beuzekom is PhD Candidate researching Smart Energy Systems at the Eindhoven University of Technology.

Active collaboration

Prof. dr. Olli Bräysy is chaired professor of logistics in University of Jyväskylä (Finland). His main focus is efficient modeling and solution methodologies for challenging logistics optimization problems. In his career, Dr. Bräysy developed many award winning optimization algorithms.. He is a structural collaborator of ORTEC.

Prof. dr. ir. Hein Fleuren wrote his PhD dissertation on Vehicle routing and Scheduling at the University of Twente. Since 2000, he is professor and has a chair in Applying Operations Research at the University of Tilburg. In 2012, he led the team that received the INFORMS Franz Edelman Award for the work entitled “Supply Chain-Wide Optimization at TNT Express”.

Prof. Dr. Erwin Hans

wrote his PhD dissertation on Resource Loading by Branch-and-Price Techniques at the University of Twente where he is Professor Operations Management in Healthcare.

ORTEC and Operations Research videos